Have you ever been in a situation where you saw something you just couldn't explain? You tell yourself it was just a shadow or a bump in the night, but there's something about it that makes all the hairs on your body stand up and gives you chills all over. It's the kind of thing you keep playing back over and over in your head, but it never makes any more sense and gives you that same unsettling feeling every time.

If you haven't, consider yourself lucky. Sadly, these folks just can't say the same.